Worcester ZWBR 7-30 R 30 HE PLUS COMBI Service Booklet page 27

E9
and flashing.
Safety temperature limiter has tripped.
Check
5. Is lead disconnected from CH flow
safety temp. limiter?
B Power OFF the appliance.
6.
B Disconnect lead to CH flow safety
temperature limiter.
B Measure the CH flow safety tem-
perature limiter for continuity.
Resistance very high?
B Power OFF the appliance.
7.
B Remove fuse SI 3 from appliance
PCB control board and test for
continuity.
Resistance very high?
8. The PCB control board is damaged.
7 181 465 347 (05.01)
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
B Power OFF the appliance.
yes:
B Reconnect lead.
B Turn ON the appliance.
B Press
, restart the appliance.
E9? ↓ 6.
↓ 6.
no:
B Change CH flow safety temperature limiter.
yes:
B Connect CH flow safety temperature limiter.
B Turn ON the appliance.
B Press
, restart the appliance.
E9? ↓ 7.
B Connect CH flow safety temperature limiter.
no:
B Turn ON the appliance.
↓ 7.
B Change the fuse.
yes:
B Turn ON the appliance.
B Press
, restart the appliance.
E9? ↓ 8.
B Remount the fuse.
no:
B Turn ON the appliance.
↓ 8.
B Make a note of the altered service settings (see
table 1 on page 7 ).
B Power OFF the appliance.
B Disconnect the boiler electrical connection.
B Change PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
B Restore service settings previously noted down.
Rectifying faults
Error E9
27